body, html
    line-height : 1
    font-weight: 200
    font-family : 'PingFang Sc','STHeitiSC-Light','Helvetica-Light',arial,sans-serif
// 清除浮动
.clearfix
    display : inline-block
    &:after
        display : block
        content : "."
        height : 0
        line-height : 0
        clear : both
        visibility : hidden
// 导航栏下划线 根据不同的dpi设置粗细 1.5*0.7 2*0.5
@media (-webkit-min-device-pixel-ratio: 1.5),(min-device-pixel-ratio: 1.5)
    .border-1px
        &::after
            -webkit-transform: scaleY(0.7)
            transform: scaleY(0.7)
@media (-webkit-min-device-pixel-ratio: 2),(min-device-pixel-ratio: 2)
    .border-1px
        &::after
            -webkit-transform: scaleY(0.5)
            transform: scaleY(0.5)